By removing all capacities either from the original Price Profile or on the individual Performance page.
By doing either of these, the performance will appear on the calendar but as crossed out.
NOTE - If you remove capacities from the Price Profile, then this will remove capacities from all performances attached to that Price Profile. If you just want to remove capacities from a single performance, you will need to remove capacities on the individual Performance page.
If a performance has been unlinked from a Price Profile and you'd like to change capacities on multiple performances, you will also need to do, as any changes to the original Price Profile will no longer pull through.
If you remove Channels from a performance then the performance day appears as blank on the calendar.